u/Smagdali

Optoma released a new firmware update for the CinemaX series on March 19, 2026. This update does not present itself as an Over-The-Air (OTA) network update (At least not on my CinemaX Pro), so you will need to flash it manually via USB.

The U.S. support site no longer lists downloads. I found them on the European Optoma site. Then I couldn't find the P1 due to the regional naming convention of the P1 being sold under a different model number abroad, UHZ65UST.

The CinemaX P1 and CinemaX Pro use the same firmware as the European UHZ65UST. Flashing the UHZ65UST firmware onto a US CinemaX Pro works perfectly.

Here are the download links for each model:

P1 (UHZ65UST) / Pro:

Firmware

Changelog

P2:

Firmware

Changelog

Key Changes in This Release

The documentation lists the system firmware as version 17.2, but once installed, the projector info screen correctly identifies it as C18.

• HDMI 2.1 / 8K AVR Handshake Fixes: Resolves sync loops, snowy images, black screens, and incorrect resolution detection when connected to modern Denon, Yamaha, and Marantz receivers.
• Expanded Audio Delay: Internal speaker delay limits have been increased to +/-150ms (Auto Settings) to better address lip-sync and audio alignment issues. This applies only to the built-in soundbar.
• Discrete Power Off Command: Added support for a discrete IR/BT "Power Off" code. The full hex code list can be found on the product download page.
• UI Bug Fixes: Corrected an issue from previous builds where audio settings values would incorrectly display as zero or negative.
• App Removal: The unsupported iQIYI application has been removed from the marketplace.

If you have been dealing with handshake drops or audio sync issues on your setup, this update is worth the manual effort. Make sure to use a FAT32-formatted USB drive for the flash process.

EDIT: u/Smagdali over on AVSForums pointed out that these FWs somewhat address a serious security vulnerability in these projectors that he discovered: https://whitelabel.org/security/2026-02-01-smart-projector/

I thought this was more common knowledge since the update occurred last year, so I wanted to help spread awareness since it looks like it’s not well known. I used to ship with PirateShip but have moved to eBay labels because of this change.

https://www.ebay.com/sellercenter/news/2025-september/inr-policy-updates

https://www.ebay.com/help/policies/selling-policies/seller-protections?id=4345 (Scroll down to ‘Other protections’ then click on ‘eBay Money Back Guarantee requests’ under ‘If a buyer reports that an item hasn't arrived’ it states ‘Additionally, we’ll protect you if you use an eBay label and the item is delivered to the buyer after you’ve issued a refund. We'll automatically reimburse you for the item, remove defects, and exclude the case from service metrics.’

I get both sides of the argument, it’s not that most of us can’t afford an extra $5 ($120/yr vs $60/yr), it’s a ‘luxury’ after all, it’s the principle of the value, at $5/mo who cares, it’s a nice to have backup, at $10/mo it’s now crossed the threshold of a service that I actively use daily, which this wouldn’t fall into for most people. I can see though where this is perfect for an always on offsite IOT only network.

On the flip side, you’re talking about a satellite service that even 6+ years ago wasn’t even an option, with shitty HughesNet costing $150+ for garbage service, Starlink has made high speed satellite internet highly available to more people. On the surface, even $10/mo isn’t bad for what it is, but, since they launched the Standby plan at $5/mo initially, it has ‘anchored’ the price for people, and now any increase will be seen as a shitty value.

I have AT&T Fiber, I strictly had this for a backup in a hurricane prone area, for me, $10/mo isn’t worth it for the backup option that may get used once a year, $5/mo was.

EDIT: At $10/mo for Unl Low Speed is where I’d now rather spend the $5 extra for Unl High Speed 5G, Computers4People resells T-Mobile High Speed sims for $14.99/mo which I have at my moms place as her primary ISP. They do shape traffic shape/throttle streaming services to 1.5Mb/s but that can be bypassed with a VPN. Outside of that she gets ~400/60 service on a UniFi 5G Max connected to a UDR7.